Third-person singular present simple form of fail(verb)
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Use "faileth" in a sentence
"And although we have no further account of Ebedmeleck, yet we have every reason to believe that the promise to him was also fulfilled; as it was made by Him whose promises are sure, and whose word faileth not."
"Among other things, every female member of the church above the age of 18 is a member of the Relief Society, whose motto — taken from the Books of Corinthians and Moroni — is “Charity never faileth …”"
"I made that in the heavens there should rise light that never faileth...."